Small Cell Lung Cancer Extensive Stage

• Shandong Province Cancer Hospital — Jinan, China
• Tianjin Medical University Cancer Institute & Hospital — Tianjin, China
• Henan Provincial People's Hospital — Zhengzhou, China

• Union hospital — Wuhan, Hubei, China

• Second Affiliated Hospital of Zhejiang University — Hangzhou, Zhejiang, China

• Guangzhou Institute of Respiratory Disease (Responsible Party) — Guangzhou, China

• Shanghai Chest Hospital — Shanghai, China

Not specified

Not specified

• Hebei Medical University Fourth Hospital — Shijiazhuang, Hebei, China

Not specified

• Fujian Cancer Hospital — Fuzhou, Fujian, China
• Fujian Provincial Hospital — Fuzhou, Fujian, China
• The First Affiliated Hospital of Xiamen University — Xiamen, Fujian, China
• The First Affiliated Hospital of Fujian Medical University — Fuzhou, China